| Vendor | Spec | Unit | Price | Currency | Date |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 349.54 | USD | 20250721 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 349.66 | USD | 20250718 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 363.65 | USD | 20250718 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 363.83 | USD | 20250717 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 349.84 | USD | 20250717 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 349.52 | USD | 20250716 |
| Shandong Langcheng Chemical Co., Ltd. | China national standards | MT | 363.5 | USD | 20250716 |